But it is not stealing we agree with the conditions.

You arrange the $100 job, I agree to work and get paid $95, you get $5 profits. But one needs to understand that this $5 is not free to you, you worked for it, you had to negotiate with the customer and with the about the job and pay.

Often those negotiation are hard and sometimes the worker do bad job and it's your job as an employer to fix all.